MCIO riser flaw: GPUs sag off the bus — DIY 3D-printed bracket incoming

TheZachMueller · x · 2026-10-19

Developer TheZachMueller hit a flaw while mounting multiple GPUs with MCIO risers: gravity pulls the cards off the bus, so he's improvising with rubber bands for now.

His fix: 3D-print a retention bracket in PETG with a locking mechanism for easy removal — four pegs on the bottom slot into the riser while the top wraps over the GPU. A metal support bar underneath was considered but there's no room. A useful gotcha for anyone running GPUs vertically on risers.

Related event: GPUs Drop Off PCIe Bus Due to Gravity with MCIO Risers(2 posts)→

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